Technology of post-harvest processing of stevia
DOI:
https://doi.org/10.31548/dopovidi2018.04.013Abstract
Purpose. To improve the method of post-harvest treatment of stevia by ensuring the complete removal of organic impurities through differentiated treatment. Methods. Laboratory, field, analytical, and statistical. Results. The benefits of obtaining dry stevia leaves of various dispersion are the following: complete removal of organic impurities, simple and multipurpose usage, obtaining high-quality feedstock in a short time. The productivity of stevia is subject to the interaction of biological, environmental, and agronomical factors. To increase organic matter yield is possible by increasing the growing season, leaf area and the net productivity of photosynthesis.
The productivity of photosynthesis was significantly affected by growing new high-yielding tetraploid hybrids providing drip irrigation, fertigation, optimal rates of mineral fertilizers for the soil and foliar dressing
It was experimentally proved that the highest productivity of plants (yield of green mass of 34.2 t/ha and dry mass of 4.1 t/ha) was reached when propagating stevia with seeds: seeding stimulated seeds at 4-5 plants per 1m in late May.
Conclusions. An important task for obtaining competitive feedstock of stevia is post-harvest treatment which helps to improve the quality of dry stevia leaves for further utilization in food production.
Keywords: stevia, leaves, drying technology, quality
References
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